Those who said: she observes the waiting period and marries, without further waiting

Sayyiduna Umar bin al-Khattab and Sayyiduna Uthman bin Affan (may Allah be pleased with them both) said: When her husband goes missing, the woman will wait four years and then observe a waiting period (iddah) of four months and ten days.

Sayyiduna Umar (may Allah be pleased with him) said concerning a woman whose husband has gone missing: The woman will wait four years, then the man's guardian will be summoned and he will divorce her, and then she will observe a waiting period ('iddah) of four months and ten days.

Sa'id bin al-Musayyib said concerning a man who goes missing between the two battle lines: His wife will observe a waiting period ('iddah) of one year.

Yahya bin Ja'dah said: In the time of Sayyiduna Umar (may Allah be pleased with him), a man was carried off by the jinn. His wife came to Sayyiduna Umar (may Allah be pleased with him) and told him the whole situation, so Sayyiduna Umar (may Allah be pleased with him) ordered her to wait four years. After four years he ordered the husband's guardian to divorce the woman. Then he ordered the woman to observe the waiting period ('iddah). When the 'iddah is complete she may marry, and if her husband returns, the man will be given the choice of one of two things: the wife or the dowry.

Sa'id bin al-Musayyib said concerning a man who goes missing between the two battle lines: His wife will wait one year.